Tag Archives: ellipsoidal

Altman 360W Lamp Base End Cap w/Socket

I’m always forgetting the orientation of the lamp socket platform relative to the fixture end cap (base) when replacing the lamp socket.  So this photo is a reminder.

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Night Before Christmas – Control Booth Edition

This link is from our friend Max: Hope you enjoy: http://www.controlbooth.com/forums/news/10439-twas-night-before-christmas-cb-edition.html

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Calculating Beam Angles for Theatre

. Here’s a simple formula to calculate beam angles for theatre lights: Fixture Beam angle = Beam Width/Throw Distance * 0.18 Alternately, this can be written as: Beam Diameter = Fixture Beam Angle * Throw Distance * 0.18 . A … Continue reading

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Safety Extra Low Voltage (SELV)

In various theatre applications, low voltage is best for portable and battery powered lights.  When working with various safety organizations who may inspect your on-stage wiring, it’s good to keep within SELV (Safety Extra Low Voltage) guidelines. . . As … Continue reading

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“Focus Tape” – lighting video

Here’s what we are really doing up in the coves during “hang and focus”.  Performing a music video! . Ok, it’s actually a video from the San Francisco Opera (SFO) lighting/electrical staff.   And for those who don’t know, a … Continue reading

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